Rail bolt



F. SZYIVIANSKI AND A. AND P. DUDEK.

RAIL BOLT.

APPLICATION FILED 0CT.25| |921.

1,437,871. Patented Dee. 5, 1922.

@y W Arron/vir ilfatented Dec. 5, 1922.

'l' E S narran sr -FRANCISZEX SZYMANSKI, ANDREW DUDEK, AND PIOTR DUDEK, OF ELLSVJORTiI-I, PENNSYLVANIA.

RAIL BOLT.

Application led October 25, 1921. vSerial No. 510,296.

To all whom it may concern Be it known that we, FnnNorsznn `SZY- n'ANsni, a citizen ot Poland, `ANDREW Dunnn, a citizen of the United States, and

Pio'rn DUDEK, a citizen of Poland, residing provide a bolt such as is generally used ink construction, railway and mechanical work, with means by which a nut may be engaged in a manner that will prevent it from being released or removed by vibration or torsional strain. 4

Another object is the provision oi' means by which a nut, mechanically secured to a co-acting bolt.I may be removed or tightened by manipulating a securing element rotatably engaged with the nut.

These and other like ob 'ects are attained by the novel construction and arrangement of parts hereinafter described and shown in the accompanying drawing, forminga material part ot this disclosure, and in which --l Figure 1 is a side view of a bolt and lock nut made in accordance with the invention. Figure 2 is a partial sectional view of the same taken on the line 2--2 of Figure 1.l

Figure 3 is a sectional View of the nut, taken on the line 3-3 of Figure 2. y Figure 1 is a perspective view of the nut showing the locking pawls and releasing ring guides.

Figure 5 is a perspective view of the lockin e` pawl releasing ring.

Referring to the figures in detail, the numeral 10 designates the body of a bolt, having a button head 11 and a screw threaded portion 12 in which are formed a plurality of longitudinal, spaced slots 13.

A nut 14C, adapted to engage thethreaded bolt element 12, is provided with a plurality of raised blocks 15, their outer edges 16 being arcuately curved and concentric with the tapped hole' 1'?, thus forming guide elefy the relative position of parts when the lockments about `which the locking pawl releasing ring 18, is rotatably positioned.

Between the blocks 15 a plurality of hook ended locking pawls 2O are pivotally mounted on the'face of the nut 141, by pivot pins 21 fixed in the nut. At the pivoted endet the locking pawls 10, yand radial with the pivotal center are integral extensions 22, adapted to abut thefprojecting lugs 23 of f the releasing ring 18.

Springs 211, secured to the innerr side of the blocks 15, impinge against thelocking pawls 20, causing their hooked ends to drop intoJ engagement with the slots 13 of the bolt section 12.

Reference to the Figure 2 discloses clearly ingfpawls are in locked engagement with the slots of the bolt. f

The ring 18 on being rotated in cloclcwise direction, causes engagement between the lugs23 and pawl extensions 22, and further rotation forces the locking pawls out of engagement with. the slots 13, thus permitting the nut to be removed from the bolt.

A keeperplate 25, having a central annular opening 26, through which the bolt freely passes, is secured tothe nut tace by the screws 27 engaging the nut through the blocks 15.

i Openings 28 are provided through the wall of the ring for the introduction of a wire'or Spanner wrench foreitecting rotation.` y

The foregoing disclosure is to be regarded y as descriptive and illustrative only, and not as restrictive or limitative of the invention, of which obviously an embodiment may be constructed including many modifications without departing from the general scope herein indicated and denoted in the appended claim. y 4

Having thus described vour invention, what we claim as new and desire to secure by Letters Patent, is: y

A lock comprising, in combination with a screw-threaded. element having slots formed transversely of the threads, a *polygonal body' internally threaded to suit said element,v raised blocks on one side of said body, said blocks having` curved outer surfaces concentric to the opening in said body, Spring* 'actuated pawls pvoted on said body, be-

tween said blocks the Donts of said navals L l, belnv ada )ted to eno'ag'e 1n the slos o sald :n c ll element7 outwardly extenclmg lugs on sind puwls, `a ring 4romtzloly clreumjaeent sind 

